JetSmarter, around since 2013, is an example of a player in the private aviation space selling shared flights. The company operates on a membership model: Fliers pay a minimum of $15,000 a year and book seats on already scheduled flights through the JetSmarter app, which lists more than 150 domestic and international trips a day. Trips under three hours are included in the cost of the membership while longer ones are an average of $300 a person, according to Sergey Petrossov, the company’s chief executive officer; most flights have an average of eight to 10 passengers.

Blade, which doesn’t require membership, also sells flights, but only from December through mid-March and on one route, between Westchester County Airport (with or without a helicopter transfer from Manhattan) and its own terminal in Miami-Opa Locka Executive Airport. From $1,285 each way, fliers travel on a Bombardier commercial jet retrofitted with 16 seats and receive an array of amenities such as catered meals from Dean & Deluca as well as iPad Pros loaded with first-run movies; they also get accommodations for the weekend at Faena Miami, a luxury beachfront hotel.
An affinity charter is slightly different in that, although all of the passengers are affiliated with a specific business, group or organization, each pays his own air fare. The passengers might sports or music fans traveling to a special event, or a bunch of friends going on vacation. With this type of charter, none of the seats can be sold to members of public.
One particular type of operating lease is the wet lease, in which the aircraft is leased together with its crew. Such leases are generally on a short-term basis to cover bursts in demand, such as the Hajj pilgrimage. Unlike a charter flight, a wet-leased aircraft operates as part of the leasing carrier's fleet and with that carrier's airline code, although it often retains the livery of its owner.
Every aspect of our operations at PACI revolves around a steadfast commitment to safety. To ensure maximum safety for our customers, all aircraft operated by PACI are IS-BAO Registered, ARGUS Platinum Rated, Wyvern Approved and have a robust Safety Management System (SMS) and a comprehensive Emergency Response Plan (ERP). All charter flights are tracked by FAA licensed dispatchers in our 24/7 Operation Control Center. Pentastar Aviation meets the maximum industry safety standards.

Members who want to set their own schedule can create a flight and post it to JetSmarter’s app so that other interested members can buy seats for the route and help reduce the cost of the charter; if all the seats on the plane sell, the member who created the flight flies for free. These crowdsourced trips usually top out at $2,000 a person, a fraction of the $8,000 or more per hour it can cost for a traditional charter. “My goal is to make private jet flying less elitist,” Mr. Petrossov said.

Though the early Lockheed Jetstar had four, most production business jets have two jet engines, mostly rear-mounted podded engine. If mounted below their low wing, it wouldn't allow sufficient engine clearance without a too long landing gear. The HondaJet is the exception with its over the wing engine pods. Dassault Falcon still builds three-engine models derived from the Falcon 50, and the very light jet market has seen several single-engine design concepts and the introduction of the Cirrus Vision SF50 in 2016.